diff options
Diffstat (limited to 'libglusterfs/src/iobuf.c')
| -rw-r--r-- | libglusterfs/src/iobuf.c | 1146 |
1 files changed, 1146 insertions, 0 deletions
diff --git a/libglusterfs/src/iobuf.c b/libglusterfs/src/iobuf.c new file mode 100644 index 00000000000..4e7d2958764 --- /dev/null +++ b/libglusterfs/src/iobuf.c @@ -0,0 +1,1146 @@ +/* + Copyright (c) 2008-2012 Red Hat, Inc. <http://www.redhat.com> + This file is part of GlusterFS. + + This file is licensed to you under your choice of the GNU Lesser + General Public License, version 3 or any later version (LGPLv3 or + later), or the GNU General Public License, version 2 (GPLv2), in all + cases as published by the Free Software Foundation. +*/ + +#include "glusterfs/iobuf.h" +#include "glusterfs/statedump.h" +#include <stdio.h> +#include "glusterfs/libglusterfs-messages.h" + +/* + TODO: implement destroy margins and prefetching of arenas +*/ + +#define IOBUF_ARENA_MAX_INDEX \ + (sizeof(gf_iobuf_init_config) / (sizeof(struct iobuf_init_config))) + +/* Make sure this array is sorted based on pagesize */ +static const struct iobuf_init_config gf_iobuf_init_config[] = { + /* { pagesize, num_pages }, */ + {128, 1024}, {512, 512}, {2 * 1024, 512}, {8 * 1024, 128}, + {32 * 1024, 64}, {128 * 1024, 32}, {256 * 1024, 8}, {1 * 1024 * 1024, 2}, +}; + +static int +gf_iobuf_get_arena_index(const size_t page_size) +{ + int i; + + for (i = 0; i < IOBUF_ARENA_MAX_INDEX; i++) { + if (page_size <= gf_iobuf_init_config[i].pagesize) + return i; + } + + return -1; +} + +static size_t +gf_iobuf_get_pagesize(const size_t page_size, int *index) +{ + int i; + size_t size = 0; + + for (i = 0; i < IOBUF_ARENA_MAX_INDEX; i++) { + size = gf_iobuf_init_config[i].pagesize; + if (page_size <= size) { + if (index != NULL) + *index = i; + return size; + } + } + + return -1; +} + +static void +__iobuf_arena_init_iobufs(struct iobuf_arena *iobuf_arena) +{ + const int iobuf_cnt = iobuf_arena->page_count; + struct iobuf *iobuf = NULL; + int offset = 0; + int i = 0; + + iobuf_arena->iobufs = GF_CALLOC(sizeof(*iobuf), iobuf_cnt, + gf_common_mt_iobuf); + if (!iobuf_arena->iobufs) + return; + + iobuf = iobuf_arena->iobufs; + for (i = 0; i < iobuf_cnt; i++) { + INIT_LIST_HEAD(&iobuf->list); + LOCK_INIT(&iobuf->lock); + + iobuf->iobuf_arena = iobuf_arena; + + iobuf->ptr = iobuf_arena->mem_base + offset; + + list_add(&iobuf->list, &iobuf_arena->passive.list); + iobuf_arena->passive_cnt++; + + offset += iobuf_arena->page_size; + iobuf++; + } + + return; +} + +static void +__iobuf_arena_destroy_iobufs(struct iobuf_arena *iobuf_arena) +{ + int iobuf_cnt = 0; + struct iobuf *iobuf = NULL; + int i = 0; + + if (!iobuf_arena->iobufs) { + gf_msg_callingfn(THIS->name, GF_LOG_ERROR, 0, LG_MSG_IOBUFS_NOT_FOUND, + "iobufs not found"); + return; + } + + iobuf_cnt = iobuf_arena->page_count; + iobuf = iobuf_arena->iobufs; + for (i = 0; i < iobuf_cnt; i++) { + GF_ASSERT(GF_ATOMIC_GET(iobuf->ref) == 0); + + LOCK_DESTROY(&iobuf->lock); + list_del_init(&iobuf->list); + iobuf++; + } + + GF_FREE(iobuf_arena->iobufs); + + return; +} + +static void +__iobuf_arena_destroy(struct iobuf_pool *iobuf_pool, + struct iobuf_arena *iobuf_arena) +{ + GF_VALIDATE_OR_GOTO("iobuf", iobuf_arena, out); + + if (iobuf_pool->rdma_deregistration) + iobuf_pool->rdma_deregistration(iobuf_pool->mr_list, iobuf_arena); + + __iobuf_arena_destroy_iobufs(iobuf_arena); + + if (iobuf_arena->mem_base && iobuf_arena->mem_base != MAP_FAILED) + munmap(iobuf_arena->mem_base, iobuf_arena->arena_size); + + GF_FREE(iobuf_arena); +out: + return; +} + +static struct iobuf_arena * +__iobuf_arena_alloc(struct iobuf_pool *iobuf_pool, size_t page_size, + int32_t num_iobufs) +{ + struct iobuf_arena *iobuf_arena = NULL; + size_t rounded_size = 0; + int index = 0; /* unused */ + + GF_VALIDATE_OR_GOTO("iobuf", iobuf_pool, out); + + iobuf_arena = GF_CALLOC(sizeof(*iobuf_arena), 1, gf_common_mt_iobuf_arena); + if (!iobuf_arena) + goto err; + + INIT_LIST_HEAD(&iobuf_arena->list); + INIT_LIST_HEAD(&iobuf_arena->all_list); + INIT_LIST_HEAD(&iobuf_arena->active.list); + INIT_LIST_HEAD(&iobuf_arena->passive.list); + iobuf_arena->iobuf_pool = iobuf_pool; + + rounded_size = gf_iobuf_get_pagesize(page_size, &index); + + iobuf_arena->page_size = rounded_size; + iobuf_arena->page_count = num_iobufs; + + iobuf_arena->arena_size = rounded_size * num_iobufs; + + iobuf_arena->mem_base = mmap(NULL, iobuf_arena->arena_size, + PROT_READ | PROT_WRITE, + MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); + if (iobuf_arena->mem_base == MAP_FAILED) { + gf_smsg(THIS->name, GF_LOG_WARNING, 0, LG_MSG_MAPPING_FAILED, NULL); + goto err; + } + + if (iobuf_pool->rdma_registration) { + iobuf_pool->rdma_registration(iobuf_pool->device, iobuf_arena); + } + + list_add_tail(&iobuf_arena->all_list, &iobuf_pool->all_arenas); + + __iobuf_arena_init_iobufs(iobuf_arena); + if (!iobuf_arena->iobufs) { + gf_smsg(THIS->name, GF_LOG_ERROR, 0, LG_MSG_INIT_IOBUF_FAILED, NULL); + goto err; + } + + iobuf_pool->arena_cnt++; + + return iobuf_arena; + +err: + __iobuf_arena_destroy(iobuf_pool, iobuf_arena); + +out: + return NULL; +} + +static struct iobuf_arena * +__iobuf_arena_unprune(struct iobuf_pool *iobuf_pool, const size_t page_size, + const int index) +{ + struct iobuf_arena *iobuf_arena = NULL; + struct iobuf_arena *tmp = NULL; + + GF_VALIDATE_OR_GOTO("iobuf", iobuf_pool, out); + + list_for_each_entry(tmp, &iobuf_pool->purge[index], list) + { + list_del_init(&tmp->list); + iobuf_arena = tmp; + break; + } +out: + return iobuf_arena; +} + +static struct iobuf_arena * +__iobuf_pool_add_arena(struct iobuf_pool *iobuf_pool, const size_t page_size, + const int32_t num_pages, const int index) +{ + struct iobuf_arena *iobuf_arena = NULL; + + iobuf_arena = __iobuf_arena_unprune(iobuf_pool, page_size, index); + + if (!iobuf_arena) { + iobuf_arena = __iobuf_arena_alloc(iobuf_pool, page_size, num_pages); + if (!iobuf_arena) { + gf_smsg(THIS->name, GF_LOG_WARNING, 0, LG_MSG_ARENA_NOT_FOUND, + NULL); + return NULL; + } + } + list_add(&iobuf_arena->list, &iobuf_pool->arenas[index]); + + return iobuf_arena; +} + +/* This function destroys all the iobufs and the iobuf_pool */ +void +iobuf_pool_destroy(struct iobuf_pool *iobuf_pool) +{ + struct iobuf_arena *iobuf_arena = NULL; + struct iobuf_arena *tmp = NULL; + int i = 0; + + GF_VALIDATE_OR_GOTO("iobuf", iobuf_pool, out); + + pthread_mutex_lock(&iobuf_pool->mutex); + { + for (i = 0; i < IOBUF_ARENA_MAX_INDEX; i++) { + list_for_each_entry_safe(iobuf_arena, tmp, &iobuf_pool->arenas[i], + list) + { + list_del_init(&iobuf_arena->list); + iobuf_pool->arena_cnt--; + + __iobuf_arena_destroy(iobuf_pool, iobuf_arena); + } + list_for_each_entry_safe(iobuf_arena, tmp, &iobuf_pool->purge[i], + list) + { + list_del_init(&iobuf_arena->list); + iobuf_pool->arena_cnt--; + __iobuf_arena_destroy(iobuf_pool, iobuf_arena); + } + /* If there are no iobuf leaks, there should be no + * arenas in the filled list. If at all there are any + * arenas in the filled list, the below function will + * assert. + */ + list_for_each_entry_safe(iobuf_arena, tmp, &iobuf_pool->filled[i], + list) + { + list_del_init(&iobuf_arena->list); + iobuf_pool->arena_cnt--; + __iobuf_arena_destroy(iobuf_pool, iobuf_arena); + } + /* If there are no iobuf leaks, there shoould be + * no standard allocated arenas, iobuf_put will free + * such arenas. + * TODO: Free the stdalloc arenas forcefully if present? + */ + } + } + pthread_mutex_unlock(&iobuf_pool->mutex); + + pthread_mutex_destroy(&iobuf_pool->mutex); + + GF_FREE(iobuf_pool); + +out: + return; +} + +static void +iobuf_create_stdalloc_arena(struct iobuf_pool *iobuf_pool) +{ + struct iobuf_arena *iobuf_arena = NULL; + + /* No locking required here as its called only once during init */ + iobuf_arena = GF_CALLOC(sizeof(*iobuf_arena), 1, gf_common_mt_iobuf_arena); + if (!iobuf_arena) + goto err; + + INIT_LIST_HEAD(&iobuf_arena->list); + INIT_LIST_HEAD(&iobuf_arena->active.list); + INIT_LIST_HEAD(&iobuf_arena->passive.list); + + iobuf_arena->iobuf_pool = iobuf_pool; + + iobuf_arena->page_size = 0x7fffffff; + + list_add_tail(&iobuf_arena->list, + &iobuf_pool->arenas[IOBUF_ARENA_MAX_INDEX]); + +err: + return; +} + +struct iobuf_pool * +iobuf_pool_new(void) +{ + struct iobuf_pool *iobuf_pool = NULL; + int i = 0; + size_t page_size = 0; + size_t arena_size = 0; + int32_t num_pages = 0; + + iobuf_pool = GF_CALLOC(sizeof(*iobuf_pool), 1, gf_common_mt_iobuf_pool); + if (!iobuf_pool) + goto out; + INIT_LIST_HEAD(&iobuf_pool->all_arenas); + pthread_mutex_init(&iobuf_pool->mutex, NULL); + for (i = 0; i <= IOBUF_ARENA_MAX_INDEX; i++) { + INIT_LIST_HEAD(&iobuf_pool->arenas[i]); + INIT_LIST_HEAD(&iobuf_pool->filled[i]); + INIT_LIST_HEAD(&iobuf_pool->purge[i]); + } + + iobuf_pool->default_page_size = 128 * GF_UNIT_KB; + + iobuf_pool->rdma_registration = NULL; + iobuf_pool->rdma_deregistration = NULL; + + for (i = 0; i < GF_RDMA_DEVICE_COUNT; i++) { + iobuf_pool->device[i] = NULL; + iobuf_pool->mr_list[i] = NULL; + } + + /* No locking required here + * as no one else can use this pool yet + */ + for (i = 0; i < IOBUF_ARENA_MAX_INDEX; i++) { + page_size = gf_iobuf_init_config[i].pagesize; + num_pages = gf_iobuf_init_config[i].num_pages; + + if (__iobuf_pool_add_arena(iobuf_pool, page_size, num_pages, i) != NULL) + arena_size += page_size * num_pages; + } + + /* Need an arena to handle all the bigger iobuf requests */ + iobuf_create_stdalloc_arena(iobuf_pool); + + iobuf_pool->arena_size = arena_size; +out: + + return iobuf_pool; +} + +static void +__iobuf_arena_prune(struct iobuf_pool *iobuf_pool, + struct iobuf_arena *iobuf_arena, const int index) +{ + /* code flow comes here only if the arena is in purge list and we can + * free the arena only if we have at least one arena in 'arenas' list + * (ie, at least few iobufs free in arena), that way, there won't + * be spurious mmap/unmap of buffers + */ + if (list_empty(&iobuf_pool->arenas[index])) + goto out; + + /* All cases matched, destroy */ + list_del_init(&iobuf_arena->list); + list_del_init(&iobuf_arena->all_list); + iobuf_pool->arena_cnt--; + + __iobuf_arena_destroy(iobuf_pool, iobuf_arena); + +out: + return; +} + +void +iobuf_pool_prune(struct iobuf_pool *iobuf_pool) +{ + struct iobuf_arena *iobuf_arena = NULL; + struct iobuf_arena *tmp = NULL; + int i = 0; + + GF_VALIDATE_OR_GOTO("iobuf", iobuf_pool, out); + + pthread_mutex_lock(&iobuf_pool->mutex); + { + for (i = 0; i < IOBUF_ARENA_MAX_INDEX; i++) { + if (list_empty(&iobuf_pool->arenas[i])) { + continue; + } + + list_for_each_entry_safe(iobuf_arena, tmp, &iobuf_pool->purge[i], + list) + { + __iobuf_arena_prune(iobuf_pool, iobuf_arena, i); + } + } + } + pthread_mutex_unlock(&iobuf_pool->mutex); + +out: + return; +} + +/* Always called under the iobuf_pool mutex lock */ +static struct iobuf_arena * +__iobuf_select_arena(struct iobuf_pool *iobuf_pool, const size_t page_size, + const int index) +{ + struct iobuf_arena *iobuf_arena = NULL; + struct iobuf_arena *trav = NULL; + + /* look for unused iobuf from the head-most arena */ + list_for_each_entry(trav, &iobuf_pool->arenas[index], list) + { + if (trav->passive_cnt) { + iobuf_arena = trav; + break; + } + } + + if (!iobuf_arena) { + /* all arenas were full, find the right count to add */ + iobuf_arena = __iobuf_pool_add_arena( + iobuf_pool, page_size, gf_iobuf_init_config[index].num_pages, + index); + } + + return iobuf_arena; +} + +/* Always called under the iobuf_pool mutex lock */ +static struct iobuf * +__iobuf_get(struct iobuf_pool *iobuf_pool, const size_t page_size, + const int index) +{ + struct iobuf *iobuf = NULL; + struct iobuf_arena *iobuf_arena = NULL; + + /* most eligible arena for picking an iobuf */ + iobuf_arena = __iobuf_select_arena(iobuf_pool, page_size, index); + if (!iobuf_arena) + return NULL; + + list_for_each_entry(iobuf, &iobuf_arena->passive.list, list) break; + + list_del(&iobuf->list); + iobuf_arena->passive_cnt--; + + list_add(&iobuf->list, &iobuf_arena->active.list); + iobuf_arena->active_cnt++; + + /* no resetting requied for this element */ + iobuf_arena->alloc_cnt++; + + if (iobuf_arena->max_active < iobuf_arena->active_cnt) + iobuf_arena->max_active = iobuf_arena->active_cnt; + + if (iobuf_arena->passive_cnt == 0) { + list_del(&iobuf_arena->list); + list_add(&iobuf_arena->list, &iobuf_pool->filled[index]); + } + + return iobuf; +} + +static struct iobuf * +iobuf_get_from_stdalloc(struct iobuf_pool *iobuf_pool, const size_t page_size) +{ + struct iobuf *iobuf = NULL; + struct iobuf_arena *iobuf_arena = NULL; + struct iobuf_arena *trav = NULL; + int ret = -1; + + /* The first arena in the 'MAX-INDEX' will always be used for misc */ + list_for_each_entry(trav, &iobuf_pool->arenas[IOBUF_ARENA_MAX_INDEX], list) + { + iobuf_arena = trav; + break; + } + + iobuf = GF_CALLOC(1, sizeof(*iobuf), gf_common_mt_iobuf); + if (!iobuf) + goto out; + + /* 4096 is the alignment */ + iobuf->free_ptr = GF_CALLOC(1, ((page_size + GF_IOBUF_ALIGN_SIZE) - 1), + gf_common_mt_char); + if (!iobuf->free_ptr) + goto out; + + iobuf->ptr = GF_ALIGN_BUF(iobuf->free_ptr, GF_IOBUF_ALIGN_SIZE); + iobuf->iobuf_arena = iobuf_arena; + LOCK_INIT(&iobuf->lock); + + /* Hold a ref because you are allocating and using it */ + GF_ATOMIC_INIT(iobuf->ref, 1); + + ret = 0; +out: + if (ret && iobuf) { + GF_FREE(iobuf->free_ptr); + GF_FREE(iobuf); + iobuf = NULL; + } + + return iobuf; +} + +struct iobuf * +iobuf_get2(struct iobuf_pool *iobuf_pool, size_t page_size) +{ + struct iobuf *iobuf = NULL; + size_t rounded_size = 0; + int index = 0; + + if (page_size == 0) { + page_size = iobuf_pool->default_page_size; + } + + rounded_size = gf_iobuf_get_pagesize(page_size, &index); + if (rounded_size == -1) { + /* make sure to provide the requested buffer with standard + memory allocations */ + iobuf = iobuf_get_from_stdalloc(iobuf_pool, page_size); + + gf_msg_debug("iobuf", 0, + "request for iobuf of size %zu " + "is serviced using standard calloc() (%p) as it " + "exceeds the maximum available buffer size", + page_size, iobuf); + + iobuf_pool->request_misses++; + return iobuf; + } else if (index == -1) { + gf_smsg("iobuf", GF_LOG_ERROR, 0, LG_MSG_PAGE_SIZE_EXCEEDED, + "page_size=%zu", page_size, NULL); + return NULL; + } + + pthread_mutex_lock(&iobuf_pool->mutex); + { + iobuf = __iobuf_get(iobuf_pool, rounded_size, index); + if (!iobuf) { + pthread_mutex_unlock(&iobuf_pool->mutex); + gf_smsg(THIS->name, GF_LOG_WARNING, 0, LG_MSG_IOBUF_NOT_FOUND, + NULL); + goto post_unlock; + } + + iobuf_ref(iobuf); + } + pthread_mutex_unlock(&iobuf_pool->mutex); +post_unlock: + return iobuf; +} + +struct iobuf * +iobuf_get_page_aligned(struct iobuf_pool *iobuf_pool, size_t page_size, + size_t align_size) +{ + size_t req_size = 0; + struct iobuf *iobuf = NULL; + + req_size = page_size; + + if (req_size == 0) { + req_size = iobuf_pool->default_page_size; + } + + iobuf = iobuf_get2(iobuf_pool, req_size + align_size); + if (!iobuf) + return NULL; + /* If std allocation was used, then free_ptr will be non-NULL. In this + * case, we do not want to modify the original free_ptr. + * On the other hand, if the buf was gotten through the available + * arenas, then we use iobuf->free_ptr to store the original + * pointer to the offset into the mmap'd block of memory and in turn + * reuse iobuf->ptr to hold the page-aligned address. And finally, in + * iobuf_put(), we copy iobuf->free_ptr into iobuf->ptr - back to where + * it was originally when __iobuf_get() returned this iobuf. + */ + if (!iobuf->free_ptr) + iobuf->free_ptr = iobuf->ptr; + iobuf->ptr = GF_ALIGN_BUF(iobuf->ptr, align_size); + + return iobuf; +} + +struct iobuf * +iobuf_get(struct iobuf_pool *iobuf_pool) +{ + struct iobuf *iobuf = NULL; + int index = 0; + + GF_VALIDATE_OR_GOTO("iobuf", iobuf_pool, out); + + index = gf_iobuf_get_arena_index(iobuf_pool->default_page_size); + if (index == -1) { + gf_smsg("iobuf", GF_LOG_ERROR, 0, LG_MSG_PAGE_SIZE_EXCEEDED, + "page_size=%zu", iobuf_pool->default_page_size, NULL); + return NULL; + } + + pthread_mutex_lock(&iobuf_pool->mutex); + { + iobuf = __iobuf_get(iobuf_pool, iobuf_pool->default_page_size, index); + if (!iobuf) { + pthread_mutex_unlock(&iobuf_pool->mutex); + gf_smsg(THIS->name, GF_LOG_WARNING, 0, LG_MSG_IOBUF_NOT_FOUND, + NULL); + goto out; + } + + iobuf_ref(iobuf); + } + pthread_mutex_unlock(&iobuf_pool->mutex); + +out: + return iobuf; +} + +static void +__iobuf_put(struct iobuf *iobuf, struct iobuf_arena *iobuf_arena) +{ + struct iobuf_pool *iobuf_pool = NULL; + int index = 0; + + iobuf_pool = iobuf_arena->iobuf_pool; + + index = gf_iobuf_get_arena_index(iobuf_arena->page_size); + if (index == -1) { + gf_msg_debug("iobuf", 0, + "freeing the iobuf (%p) " + "allocated with standard calloc()", + iobuf); + + /* free up properly without bothering about lists and all */ + LOCK_DESTROY(&iobuf->lock); + GF_FREE(iobuf->free_ptr); + GF_FREE(iobuf); + return; + } + + if (iobuf_arena->passive_cnt == 0) { + list_del(&iobuf_arena->list); + list_add_tail(&iobuf_arena->list, &iobuf_pool->arenas[index]); + } + + list_del_init(&iobuf->list); + iobuf_arena->active_cnt--; + + if (iobuf->free_ptr) { + iobuf->ptr = iobuf->free_ptr; + iobuf->free_ptr = NULL; + } + + list_add(&iobuf->list, &iobuf_arena->passive.list); + iobuf_arena->passive_cnt++; + + if (iobuf_arena->active_cnt == 0) { + list_del(&iobuf_arena->list); + list_add_tail(&iobuf_arena->list, &iobuf_pool->purge[index]); + GF_VALIDATE_OR_GOTO("iobuf", iobuf_pool, out); + __iobuf_arena_prune(iobuf_pool, iobuf_arena, index); + } +out: + return; +} + +void +iobuf_put(struct iobuf *iobuf) +{ + struct iobuf_arena *iobuf_arena = NULL; + struct iobuf_pool *iobuf_pool = NULL; + + GF_VALIDATE_OR_GOTO("iobuf", iobuf, out); + + iobuf_arena = iobuf->iobuf_arena; + if (!iobuf_arena) { + gf_smsg(THIS->name, GF_LOG_WARNING, 0, LG_MSG_ARENA_NOT_FOUND, NULL); + return; + } + + iobuf_pool = iobuf_arena->iobuf_pool; + if (!iobuf_pool) { + gf_smsg(THIS->name, GF_LOG_WARNING, 0, LG_MSG_POOL_NOT_FOUND, "iobuf", + NULL); + return; + } + + pthread_mutex_lock(&iobuf_pool->mutex); + { + __iobuf_put(iobuf, iobuf_arena); + } + pthread_mutex_unlock(&iobuf_pool->mutex); + +out: + return; +} + +void +iobuf_unref(struct iobuf *iobuf) +{ + int ref = 0; + + GF_VALIDATE_OR_GOTO("iobuf", iobuf, out); + + ref = GF_ATOMIC_DEC(iobuf->ref); + + if (!ref) + iobuf_put(iobuf); + +out: + return; +} + +struct iobuf * +iobuf_ref(struct iobuf *iobuf) +{ + GF_VALIDATE_OR_GOTO("iobuf", iobuf, out); + GF_ATOMIC_INC(iobuf->ref); + +out: + return iobuf; +} + +struct iobref * +iobref_new() +{ + struct iobref *iobref = NULL; + + iobref = GF_MALLOC(sizeof(*iobref), gf_common_mt_iobref); + if (!iobref) + return NULL; + + iobref->iobrefs = GF_CALLOC(sizeof(*iobref->iobrefs), 16, + gf_common_mt_iobrefs); + if (!iobref->iobrefs) { + GF_FREE(iobref); + return NULL; + } + + iobref->allocated = 16; + iobref->used = 0; + + LOCK_INIT(&iobref->lock); + + GF_ATOMIC_INIT(iobref->ref, 1); + return iobref; +} + +struct iobref * +iobref_ref(struct iobref *iobref) +{ + GF_VALIDATE_OR_GOTO("iobuf", iobref, out); + GF_ATOMIC_INC(iobref->ref); + +out: + return iobref; +} + +void +iobref_destroy(struct iobref *iobref) +{ + int i = 0; + struct iobuf *iobuf = NULL; + + GF_VALIDATE_OR_GOTO("iobuf", iobref, out); + + for (i = 0; i < iobref->allocated; i++) { + iobuf = iobref->iobrefs[i]; + + iobref->iobrefs[i] = NULL; + if (iobuf) + iobuf_unref(iobuf); + } + + GF_FREE(iobref->iobrefs); + GF_FREE(iobref); + +out: + return; +} + +void +iobref_unref(struct iobref *iobref) +{ + int ref = 0; + + GF_VALIDATE_OR_GOTO("iobuf", iobref, out); + ref = GF_ATOMIC_DEC(iobref->ref); + + if (!ref) + iobref_destroy(iobref); + +out: + return; +} + +void +iobref_clear(struct iobref *iobref) +{ + int i = 0; + + GF_VALIDATE_OR_GOTO("iobuf", iobref, out); + + for (; i < iobref->allocated; i++) { + if (iobref->iobrefs[i] != NULL) { + iobuf_unref(iobref->iobrefs[i]); + } else { + /** iobuf's are attached serially */ + break; + } + } + + iobref_unref(iobref); + +out: + return; +} + +static void +__iobref_grow(struct iobref *iobref) +{ + void *newptr = NULL; + int i = 0; + + newptr = GF_REALLOC(iobref->iobrefs, + iobref->allocated * 2 * (sizeof(*iobref->iobrefs))); + if (newptr) { + iobref->iobrefs = newptr; + iobref->allocated *= 2; + + for (i = iobref->used; i < iobref->allocated; i++) + iobref->iobrefs[i] = NULL; + } +} + +int +__iobref_add(struct iobref *iobref, struct iobuf *iobuf) +{ + int i = 0; + int ret = -ENOMEM; + + GF_VALIDATE_OR_GOTO("iobuf", iobref, out); + GF_VALIDATE_OR_GOTO("iobuf", iobuf, out); + + if (iobref->used == iobref->allocated) { + __iobref_grow(iobref); + + if (iobref->used == iobref->allocated) { + ret = -ENOMEM; + goto out; + } + } + + for (i = 0; i < iobref->allocated; i++) { + if (iobref->iobrefs[i] == NULL) { + iobref->iobrefs[i] = iobuf_ref(iobuf); + iobref->used++; + ret = 0; + break; + } + } + +out: + return ret; +} + +int +iobref_add(struct iobref *iobref, struct iobuf *iobuf) +{ + int ret = -EINVAL; + + GF_VALIDATE_OR_GOTO("iobuf", iobref, out); + GF_VALIDATE_OR_GOTO("iobuf", iobuf, out); + + LOCK(&iobref->lock); + { + ret = __iobref_add(iobref, iobuf); + } + UNLOCK(&iobref->lock); + +out: + return ret; +} + +int +iobref_merge(struct iobref *to, struct iobref *from) +{ + int i = 0; + int ret = 0; + struct iobuf *iobuf = NULL; + + GF_VALIDATE_OR_GOTO("iobuf", to, out); + GF_VALIDATE_OR_GOTO("iobuf", from, out); + + LOCK(&from->lock); + { + for (i = 0; i < from->allocated; i++) { + iobuf = from->iobrefs[i]; + + if (!iobuf) + break; + + ret = iobref_add(to, iobuf); + + if (ret < 0) + break; + } + } + UNLOCK(&from->lock); + +out: + return ret; +} + +size_t +iobuf_size(struct iobuf *iobuf) +{ + size_t size = 0; + + GF_VALIDATE_OR_GOTO("iobuf", iobuf, out); + + if (!iobuf->iobuf_arena) { + gf_smsg(THIS->name, GF_LOG_WARNING, 0, LG_MSG_ARENA_NOT_FOUND, NULL); + goto out; + } + + if (!iobuf->iobuf_arena->iobuf_pool) { + gf_smsg(THIS->name, GF_LOG_WARNING, 0, LG_MSG_POOL_NOT_FOUND, NULL); + goto out; + } + + size = iobuf->iobuf_arena->page_size; +out: + return size; +} + +size_t +iobref_size(struct iobref *iobref) +{ + size_t size = 0; + int i = 0; + + GF_VALIDATE_OR_GOTO("iobuf", iobref, out); + + LOCK(&iobref->lock); + { + for (i = 0; i < iobref->allocated; i++) { + if (iobref->iobrefs[i]) + size += iobuf_size(iobref->iobrefs[i]); + } + } + UNLOCK(&iobref->lock); + +out: + return size; +} + +void +iobuf_info_dump(struct iobuf *iobuf, const char *key_prefix) +{ + char key[GF_DUMP_MAX_BUF_LEN]; + struct iobuf my_iobuf; + int ret = 0; + + GF_VALIDATE_OR_GOTO("iobuf", iobuf, out); + + ret = TRY_LOCK(&iobuf->lock); + if (ret) { + return; + } + memcpy(&my_iobuf, iobuf, sizeof(my_iobuf)); + UNLOCK(&iobuf->lock); + + gf_proc_dump_build_key(key, key_prefix, "ref"); + gf_proc_dump_write(key, "%" GF_PRI_ATOMIC, GF_ATOMIC_GET(my_iobuf.ref)); + gf_proc_dump_build_key(key, key_prefix, "ptr"); + gf_proc_dump_write(key, "%p", my_iobuf.ptr); + +out: + return; +} + +void +iobuf_arena_info_dump(struct iobuf_arena *iobuf_arena, const char *key_prefix) +{ + char key[GF_DUMP_MAX_BUF_LEN]; + int i = 1; + struct iobuf *trav; + + GF_VALIDATE_OR_GOTO("iobuf", iobuf_arena, out); + + gf_proc_dump_build_key(key, key_prefix, "mem_base"); + gf_proc_dump_write(key, "%p", iobuf_arena->mem_base); + gf_proc_dump_build_key(key, key_prefix, "active_cnt"); + gf_proc_dump_write(key, "%d", iobuf_arena->active_cnt); + gf_proc_dump_build_key(key, key_prefix, "passive_cnt"); + gf_proc_dump_write(key, "%d", iobuf_arena->passive_cnt); + gf_proc_dump_build_key(key, key_prefix, "alloc_cnt"); + gf_proc_dump_write(key, "%" PRIu64, iobuf_arena->alloc_cnt); + gf_proc_dump_build_key(key, key_prefix, "max_active"); + gf_proc_dump_write(key, "%d", iobuf_arena->max_active); + gf_proc_dump_build_key(key, key_prefix, "page_size"); + gf_proc_dump_write(key, "%" GF_PRI_SIZET, iobuf_arena->page_size); + list_for_each_entry(trav, &iobuf_arena->active.list, list) + { + gf_proc_dump_build_key(key, key_prefix, "active_iobuf.%d", i++); + gf_proc_dump_add_section("%s", key); + iobuf_info_dump(trav, key); + } + +out: + return; +} + +void +iobuf_stats_dump(struct iobuf_pool *iobuf_pool) +{ + char msg[1024]; + struct iobuf_arena *trav = NULL; + int i = 1; + int j = 0; + int ret = -1; + + GF_VALIDATE_OR_GOTO("iobuf", iobuf_pool, out); + + ret = pthread_mutex_trylock(&iobuf_pool->mutex); + + if (ret) { + return; + } + gf_proc_dump_add_section("iobuf.global"); + gf_proc_dump_write("iobuf_pool", "%p", iobuf_pool); + gf_proc_dump_write("iobuf_pool.default_page_size", "%" GF_PRI_SIZET, + iobuf_pool->default_page_size); + gf_proc_dump_write("iobuf_pool.arena_size", "%" GF_PRI_SIZET, + iobuf_pool->arena_size); + gf_proc_dump_write("iobuf_pool.arena_cnt", "%d", iobuf_pool->arena_cnt); + gf_proc_dump_write("iobuf_pool.request_misses", "%" PRId64, + iobuf_pool->request_misses); + + for (j = 0; j < IOBUF_ARENA_MAX_INDEX; j++) { + list_for_each_entry(trav, &iobuf_pool->arenas[j], list) + { + snprintf(msg, sizeof(msg), "arena.%d", i); + gf_proc_dump_add_section("%s", msg); + iobuf_arena_info_dump(trav, msg); + i++; + } + list_for_each_entry(trav, &iobuf_pool->purge[j], list) + { + snprintf(msg, sizeof(msg), "purge.%d", i); + gf_proc_dump_add_section("%s", msg); + iobuf_arena_info_dump(trav, msg); + i++; + } + list_for_each_entry(trav, &iobuf_pool->filled[j], list) + { + snprintf(msg, sizeof(msg), "filled.%d", i); + gf_proc_dump_add_section("%s", msg); + iobuf_arena_info_dump(trav, msg); + i++; + } + } + + pthread_mutex_unlock(&iobuf_pool->mutex); + +out: + return; +} + +void +iobuf_to_iovec(struct iobuf *iob, struct iovec *iov) +{ + GF_VALIDATE_OR_GOTO("iobuf", iob, out); + GF_VALIDATE_OR_GOTO("iobuf", iov, out); + + iov->iov_base = iobuf_ptr(iob); + iov->iov_len = iobuf_pagesize(iob); + +out: + return; +} + +int +iobuf_copy(struct iobuf_pool *iobuf_pool, const struct iovec *iovec_src, + int iovcnt, struct iobref **iobref, struct iobuf **iobuf, + struct iovec *iov_dst) +{ + size_t size = -1; + int ret = 0; + + size = iov_length(iovec_src, iovcnt); + + *iobuf = iobuf_get2(iobuf_pool, size); + if (!(*iobuf)) { + ret = -1; + errno = ENOMEM; + goto out; + } + + *iobref = iobref_new(); + if (!(*iobref)) { + iobuf_unref(*iobuf); + errno = ENOMEM; + ret = -1; + goto out; + } + + ret = iobref_add(*iobref, *iobuf); + if (ret) { + iobuf_unref(*iobuf); + iobref_unref(*iobref); + errno = ENOMEM; + ret = -1; + goto out; + } + + iov_unload(iobuf_ptr(*iobuf), iovec_src, iovcnt); + + iov_dst->iov_base = iobuf_ptr(*iobuf); + iov_dst->iov_len = size; + +out: + return ret; +} |